Alloy 20 (20Cb-3)

Technical Data Sheet

Chemical Composition Limits

Weight%

Ni

Cr

Mo

Mn

Cu

Si

C

S

P

Cb + Ta

Fe

Alloy 20
20Cb-3

32.5-35.0

19-21

2-3

2 max

3-4

1 max

0.06 max

0.035 max

0.035 max

8 X 1.0

Bal

Alloy 20 (20Cb-3) is an austenitic stainless steel which was designed for maximum resistance to acid attacks and as such has excellent resistance to hot sulfuric acid. Alloy 20 is also resistant to intergranular corrosion in the as-welded condition. At 33% nickel, Alloy 20 has practical immunity to chloride stress corrosion cracking. Alloy 20 is used is a wide variety of applications from Sulfuric acid pickling tanks, racks and heating coil, Heat Exchangers, Process piping, Chemical and petroleum process equipment etc.